State Troopers were dispatched to Route 440 North around 2:45 p.m. on a report of an overturned vehicle when they found a substance leaking from a tractor-trailer, according to Detective Brian Polite, a spokesman for the N.J. State Police. Local Haz-Mat teams determined that the substance was a chemical agent used in the making of perfume, Polite said.

A placard inside the truck labeled the substance as "highly flammable and a dangerous inhalant," prompting multiple agencies to respond, Polite said.

The State Police’s Incident Management and Haz-Mat units, the Middlesex County Haz-Mat team and the Hopelawn, Woodbridge and Keasby fire departments all responded to the scene to conduct a clean-up, according to Polite.

The accident tied up traffic in the area for hours as authorities worked to clear the wreck. The crash forced emergency crews to shut down a ramp that connects Route 440 to the Garden State Parkway and Route 9, according to 511nj.org, the Department of Transportation’s traffic alert web site.

The ramp was still closed as of 7:30 p.m. last night, according to the website.

The driver of the vehicle, a 65-year-old New York resident, was taken to a Perth Amboy hospital and treated for non-life threatening injuries, according to Polite.

Authorities were not sure about the cause of the accident tonight, or if the liquids actually caught fire at the scene.